Scotsman MCL 1210 A, Руководство по обслуживанию

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During the defrost cycle the hot gas valve coil is
activated so to attract the hot gas valve piston in
order to give way to the hot gas discharged from
the compressor to flow directly into the evaporator
serpentine to defrost the formed ice cubes.
L. FAN MOTOR (Alir cooled version)
The fan motor is controlled through the P.C.
BOARD and the TRIAC by the condenser tempe-
rature sensor. Normally it operates only during
the freezing cycle to draw cooling air through the
condenser fins.
In the second part of the freezing cycle, the fan
motor can run at intermittance as the condenser
pressure must be kept between two
corresponding head pressure values (16
÷
18 bars-
225
÷
250 psig).
M. COMPRESSOR
The hermetic compressor is the heart of the
refrigerant system and it is used to circulate and
retrieve the refrigerant throughout the entire
system.
It compresses the low pressure refrigerant vapor
causing its temperature to rise and become high
pressure hot vapor which is then released through
the discharge valve.
N. WATER REGULATING VALVE
(Water cooled version)
This valve controls the head pressure in the
refrigerant system by regulating the flow of water
going to the condenser.
As pressure increases, the water regulating val-
ve opens to increase the flow of cooling water.
O. CONTACTOR
Placed outside of the control box it is controlled
by the P.C. BOARD in order to close or open the
electrical circuit to the compressor.
P. WATER DRAIN SOLENOID VALVE
The water drain solenoid valve, electrically
connected in parallel to the water inlet and to the
hot gas solenoid valves, is energized for all the
length of the defrost cycle.
By means of the water pump, that remains
energized for 30 seconds at the beginning of the
defrost cycle, it allows the drain out of all remaining
water (rich of minerals deposited during the
previous freezing cycle) from the sump tank.
By doing so it allows to the ice maker to make
every new freezing cycle with new fresh water,
avoiding thereby the accumulation of sediments
and scales, which soon or later will cause the
partial or total clogging of the water system on the
unit.
Q. CURRENT RELAY
(3 PHASE VERSION ONLY)
Connected in series to the 3 phase compressor
trips off the compressor contactor when the
current of one of the three phases is more then:
Voltage Current
230/50/3 8 Amps
230/60/3 9 Amps
400/50/3 6 Amps